docs: def _run_systemdrun_decide(self):
          """
          Internal method
          decide if it is possible to use --wait option to systemd
          for example RHEL7 does not support --wait option
  
          :return: bool
          """
          if self.systemd_wait_support is None:
              self.systemd_wait_support = "--wait" in run_cmd(
                  ["systemd-run", "--help"], return_output=True)
          return self.systemd_wait_support